One never notices what has been done; one can only see what remains to be done.

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  I was taught that the way of progress was neither swift nor easy.

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  I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success.

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  The ultimate purpose is the complete mastery of mind over the material world, the harnessing of the forces of nature to human needs.

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  What I cannot create, I do not understand.

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  Genius is one percent inspiration and ninety-nine percent perspiration.

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  The object of the artist is the creation of the beautiful. What the beautiful is is another question.

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